Hinge-pin.



NO- 739306. PATENTED SEPT. 22; 1903. r

J. 62., GRIFEEE HINGE PIE;

- APPLIOATION FILED. mm. 11%. 1902..

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UNITED STATES Patented September 22, 1903.

PATENT OFFICE.

HINGE-PIN.

SPECIFICATION forming part of Letters Patent No. 739,306, dated September 22, 1903,

Application filed November 10, 1902. Serial No. 130,749. (No model.)

To all whom it may concern:

Be it known that I, JAMES COLEMAN GRIF- FIN, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Hinge-Pins, of which the following is a specification.

This invention relates to hinge-pins and it consists in certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claim.

The invention is illustrated in the accompanying drawings, as follows:

Figure 1 shows a view, partly in section, of my preferred construction of hinge-pin; Fig. 2, an alternative construction.

A marks the rod portion of the pin; a, the head. Arranged on the rod and against the head is a perforated disk B, forming a shoulder which rests on the hinge-joint.

It has been found by practice that a hingepin constructed from a steel or wrought rod with an upset head, the shoulder being provided by a perforated disk, as B, is very much cheaper and very much more uniform in quality than cast-pins.

I prefer that the head a have a flattened portion (0 adjacent to the rod A and that the perforated disk B have a neck b and flattened portion b, the flattened portion b fitting the flattened portion a, so that the finished product has the appearance of a single piece of metal.

In the alternative construction the head a is upset with a small extending shoulder a which in the general design fulfils the same purpose as the neck I) in the preferred construction. A flat perforated disk B is se cured to the rod A,adjacent to the shoulder a Both the perforated disks B and B are pref erably secured to the rod A by simply forcing them to place, they fitting tight enough to secure them after they are once brought into proper relation with the upset head a or a What I claim as new is A hinge-pin having the upset head, said head having the flattened portion a; and a perforated disk secured to the rod of the pin and arranged againstthe flattened portion a.

In-testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JAMES C. GRIFFIN.

Witnesses:

H. O. LORD, JAMES REED CRAIG. 

